Error: "There was a problem activating..." when have incorrect serial number
Description
Cause

Incorrect serial number.

Resolution
  1. Change your serial number, referring to How to change the installed version of the program Sage 50—U.S. Edition 2016 and Newer.
  2. Verify you can open without error.
Error: "There was a problem activating. Please try again later." or "There was a problem with the activation files for Sage 50."
How to change the installed version of the program (I have a new serial number)

[BCB:161:Chat 50 US:ECB]
Steps to duplicate
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